     ;; structured data such as confidence and source for each element).
     (s/optional-key :related_indicators) [m/Reference]
     (s/optional-key :related_observables) [m/Reference]
-    (s/optional-key :leveraged_ttps) [m/Reference]
+    (s/optional-key :leveraged_TTPs) [m/Reference]
     (s/optional-key :attributed_actors) [m/Reference] ;; was attributed_threat_actors
     (s/optional-key :related_incidents) [m/Reference]
     (s/optional-key :intended_effect) m/IntendedEffect

  (merge
   m/GenericStixIdentifiers
   {:timestamp m/Time
    :vesion s/Str
    :vulnerability [m/Vulnerability]
    :weakness [m/Weakness]
    :configuration [m/Configuration]

              [ring.swagger.schema :refer [coerce!]]))

;; TODO - README for each section
;; TODO - Determine which fields should be required

;; References
(def COAReference m/Reference)
